> No, it's not fine. There isn't a good kind of racism and a bad kind of racism.
It’s not “racism” at all because it has nothing to do with “race,” which is a superficial construct. It’s about substantive differences in people’s worldview, beliefs, values, etc., which are relevant to living with people in communities and sharing a government with people.
> But you're making, and re-making, a case for excluding people because their differences of religion (your example) and culture make native-born people unhappy. That's not OK, and I'm pretty sure I've got the founders on my side of this argument.
Whether the founders envisioned it or not has nothing to do with whether it’s “racism.” There is no moral obligation to allow people with different values into your community and allow them to vote on the government that you live in. To the contrary, that notion violates the human right of self determination.
Besides that, the founders were not multiculturalists. America at the time was a collection of mostly monocultural communities. Massachusetts and several other states still had an established church. The founders created a framework where those disparate groups could cooperate in a limited fashion through a federal government of limited and enumerated powers.
That ship, however, said long ago. If a federal Department of Education exists and says what kids learn in schools and the federal government says that 99.9% Protestant communities in Iowa can’t have prayer in schools you can’t invoke what the framers thought about how pluralism should work.